Cayman Carbon with roller muzzle (patent pending). This speargun is both easy to handle and powerful. It is equipped with 16mm Performer2 bands, 6.75 mm America shaft for 75 and 90 cm spearguns and 7 mm America shaft for 100, 110 and 130 cm spearguns. New roller muzzle that allows to transform a 25mm internal diameter cilindric barrel speargun into a rollergun. A patent covers a cut placed behind the shaft that allows the nylon to have a specific place avoiding the possibility to tangle the line when shooting.